Robert D Hammond

US Patent:

49010522, Feb 13, 1990

Filed:

Jul 8, 1988

Appl. No.:

7/217697

Inventors:

Roy W. Chapel - Edmonds WA
Robert W. Hammond - Edmonds WA

Assignee:

John Fluke Mfg. Co., Inc. - Everett WA

International Classification:

H01C 1012

US Classification:

338308

Abstract:

A resistive network formed on a substrate includes film resistors formed of resistive elements, each element having a plurality of portions symmetrically disposed relative to two axes of symmetry. The biaxially symmetric arrangement provides uniform resistance characteristics for the various film resistors, thus improving stability of resistance ratios among resistors of the network. TCR tracking for the film resistors, i. e. , the TCR of a ratio of the resistors, is similarly improved. Where the elements of different resistors of the network are interleaved, the temperature of the different resistors is also made more uniform.

US Patent:

47927828, Dec 20, 1988

Filed:

Mar 16, 1987

Appl. No.:

7/026156

Inventors:

Robert W. Hammond - Edmonds WA

International Classification:

H01C 706
H01C 310

US Classification:

338309

Abstract:

A resistor divider network is disclosed having two or more thin or thick film resistive elements deposited on a substrate. Each of the resistive elements is divided into a number of resistive subelements which are interleaved so as to improve the temperature coefficient of ratio (TCR tracking) and improve the thermal coupling which greatly improves the ratio constancy over a wide range of input voltage. There are an odd total number of resistive subelements, the subelements of each main element having equal resistances.

US Patent:

47936126, Dec 27, 1988

Filed:

Feb 26, 1987

Appl. No.:

7/019208

Inventors:

Robert G. Hammond - El Toro CA

International Classification:

A63D 1510

US Classification:

273 26E

Abstract:

Apparatus for practicing and teaching ball batting characterized by use of a rotary member journaled for rotation about a shaft, and a flexible linkage affixes a ball, nominally a baseball, in a down-hanging position from the rotary member. When the ball is struck with a bat it will move in an arcuate motion about the axis of the rotary member. Particularly in accordance with the present invention, a backboard mounts the rotary member to a vertrical post. The backboard is releasably maintained upon the post by "U" bolts which hold the post against a channel formed by spaced-apart parallel spacer bars positioned upon the backboard. The flexible linkage incorporates a spring-biased hook allowing ready substitution of balls thereon.

US Patent:

48599808, Aug 22, 1989

Filed:

Jun 13, 1988

Appl. No.:

7/205965

Inventors:

Robert W. Hammond - Edmonds WA

Assignee:

John Fluke Mfg. Co., Inc. - Everett WA

International Classification:

H01C 1012

US Classification:

338308

Abstract:

A resistor divider network is disclosed having two or more thin or thick film resistive elements deposited on a substrate. Each of the resistive elements is divided into a number of resistive subelements which are interleaved so as to improve the temperature coefficient of ratio (TCR tracking) and improve the thermal coupling which greatly improves the ratio constancy over a wide range of input voltage. There are an odd total number of resistive subelements, the subelements of each main element having equal resistances.

US Patent:

20230053287, Feb 16, 2023

Filed:

Aug 5, 2022

Appl. No.:

17/817893

Inventors:

Colleen Hammond - Irvine CA, US
Robert Hammond - Irvine CA, US

International Classification:

B05B 11/06
B05B 12/00
B05B 7/24

Abstract:

A liquid sprayer powered by an inflatable standup paddle board (iSUP), comprising: a container; a sprayer hose; and an air hose. The container is configured to hold a liquid, the sprayer hose comprises a spray nozzle and is configured to pass the liquid from said container through said spray nozzle. The air hose may be configured to connect to said container and to an iSUP. The air hose may comprise a flow regulator and one-way check valve. The flow regulator is configured to start, stop, increase, and decrease a flow of air from said iSUP into the container. The one-way check valve substantially prevents said liquid from entering said iSUP. The container may accept the flow of air from said iSUP when connected to said iSUP, such that the container is pressurized. When the container is pressurized, the spray nozzle passes the liquid out of the liquid sprayer.